Arbuscular mycorrhizal fungal community structure and diversity in response to 3-year conservation tillage management in a sandy loam soil in North China

Yang, Anna; Hu, Junli; Lin, Xiangui; Zhu, Anning; Wang, Junhua; Dai, Ji; Wong, Ming Hung

doi:10.1007/s11368-012-0518-9

Cited by 19 publications

(9 citation statements)

References 49 publications

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“…5). Indeed, previous studies demonstrated that AM fungal communities were structured by soil factors [45,48,49]. However, Yang et al [4] reported that constant warming significantly altered soil AM fungal community composition in an alpine meadow on the Qinghai-Tibetan plateau, China.…”

Section: Discussionmentioning

confidence: 99%

Different responses of arbuscular mycorrhizal fungal community to day-time and night-time warming in a semiarid steppe

et al. 2014

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Arbuscular mycorrhizal (AM) fungi form mutualistic symbioses with most plant species and play important roles in ecosystems. Knowledge of the response of AM fungi to temperature change will improve our understanding of the function of AM fungal community under global climate change scenarios in ecosystems. The effects of constant warming on AM fungal communities have been investigated previously, but responses to asymmetrical warming over 24-h periods have never been documented in natural ecosystems. In this study, we examined AM fungal communities in a full factorial design including day-time and night-time warming in a semiarid steppe in northern China. Day-time and 24-h warming, but not night-time warming, significantly increased AM fungal spore density. In contrast, none of the three warming regimes had a significant effect on AM fungal extra radical hyphal density. A total of 161 operational taxonomic units (OTUs) of AM fungi were recovered by 454 pyrosequencing of 18S rDNA. Day-time, night-time, and 24-h warming all significantly increased AM fungal OTU richness. Some AM fungal OTUs showed a significant bias toward day-time, night-time or 24-h warming. The AM fungal community composition was significantly affected by night-time warming, but not by day-time and 24-h warming. Our finding highlighted different responses of AM fungal spore density and community composition to asymmetrical warming. This study might improve our understanding of ecosystem functioning of AM fungal community under global climate change scenarios in a semiarid steppe ecosystem.

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Section: Discussionmentioning

confidence: 99%

Different responses of arbuscular mycorrhizal fungal community to day-time and night-time warming in a semiarid steppe

et al. 2014

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“…Soil tillage is not tolerated by all AMF species equally, and several reports have shown that a number of AMF species are highly sensitive to soil tillage and disappear in tilled fields (Boddington and Dodd 2000, Jansa et al 2003, Castillo et al 2006, Yang et al 2012. As a consequence, tillage-induced changes in AMF communities result in AMF community structures specific to each soil practice and often lead to a reduced mycorrhizal diversity in tilled fields (Boddington and Dodd 2000, Schnoor et al 2011, Brito et al 2012, Yang et al 2012.…”

Section: Introductionmentioning

confidence: 99%

“…As a consequence, tillage-induced changes in AMF communities result in AMF community structures specific to each soil practice and often lead to a reduced mycorrhizal diversity in tilled fields (Boddington and Dodd 2000, Schnoor et al 2011, Brito et al 2012, Yang et al 2012. The soil-tillage-induced shift of the mycorrhizal community structure may have consequences for their functioning, as AMF functional traits differ considerably among and within species (Raju et al 1990, McGonigle et al 2003.…”

Section: Introductionmentioning

confidence: 99%

Agricultural practices indirectly influence plant productivity and ecosystem services through effects on soil biota

Köhl

Oehl

Heijden

2014

Ecological Applications

118

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Abstract. It is well established that agricultural practices alter the composition and diversity of soil microbial communities. However, the impact of changing soil microbial communities on the functioning of the agroecosystems is still poorly understood. Earlier work showed that soil tillage drastically altered microbial community composition. Here we tested, using an experimental grassland (Lolium, Trifolium, Plantago) as a model system, whether soil microbial communities from conventionally tilled (CT) and non-tilled (NT) soils have different influences on plant productivity and nutrient acquisition. We specifically focus on arbuscular mycorrhizal fungi (AMF), as they are a group of beneficial soil fungi that can promote plant productivity and ecosystem functioning and are also strongly affected by tillage management.Soil microbial communities from CT and NT soils varied greatly in their effects on the grassland communities. Communities from CT soil increased overall biomass production more than soil communities from NT soil. This effect was mainly due to a significant growth promotion of Trifolium by CT microorganisms. In contrast to CT soil inoculum, NT soil inoculum increased plant phosphorus concentration and total plant P content, demonstrating that the soil microbial communities from NT fields enhance P uptake. Differences in AM fungal community composition resulting, for instance, in twofold greater hyphal length in NT soil communities when compared to CT, are the most likely explanation for the different plant responses to CT and NT soil inocula.A range of field studies have shown that plant P uptake increases when farmers change to conservation tillage or direct seeding. Our results indicate that this enhanced P uptake results from enhanced hyphal length and an altered AM fungal community. Our results further demonstrate that agricultural management practices indirectly influence ecosystem services and plant community structure through effects on soil biota.

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“…In agriculture, these benefits may translate to yield increases in mycorrhizal crops (Gosling et al 2006), and even help shift competitive relationships between crops and weeds (Daisog et al 2012). However, agricultural practices, such as tillage regimes, nutrient inputs, and pesticide applications may affect AMF community composition, and even shape the evolution of particular species or strains (Oehl et al 2003, 2005, Johansson et al 2004, Gosling et al 2006, Verbruggen and Kiers 2010, Schnoor et al 2011, Yang et al 2012. In particular, high inputs of N-and Pcontaining fertilizers may select for AMF that are poor mutualists, strains that provide few nutrients to plants while continuing to consume host carbohydrates, shifting mycorrhizal function toward the parasitism end of the ''mutualism-parasitism continuum'' (Johnson 1993, Johnson et al 1997, Verbruggen and Kiers 2010, Johnson and Graham 2013.…”

Section: Introductionmentioning

confidence: 99%

Linking agricultural practices, mycorrhizal fungi, and traits mediating plant–insect interactions

Barber

Kiers

Theis

et al. 2013

Ecological Applications

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Agricultural management has profound effects on soil communities. Activities such as fertilizer inputs can modify the composition of arbuscular mycorrhizal fungi (AMF) communities, which form important symbioses with the roots of most crop plants. Intensive conventional agricultural management may select for less mutualistic AMF with reduced benefits to host plants compared to organic management, but these differences are poorly understood. AMF are generally evaluated based on their direct growth effects on plants. However, mycorrhizal colonization also may alter plant traits such as tissue nutrients, defensive chemistry, or floral traits, which mediate important plant-insect interactions like herbivory and pollination. To determine the effect of AMF from different farming practices on plant performance and traits that putatively mediate species interactions, we performed a greenhouse study by inoculating Cucumis sativus (cucumber, Cucurbitaceae) with AMF from conventional farms, organic farms, and a commercial AMF inoculum. We measured growth and a suite of plant traits hypothesized to be important predictors of herbivore resistance and pollinator attraction. Several leaf and root traits and flower production were significantly affected by AMF inoculum. Both conventional and organic AMF reduced leaf P content but increased Na content compared to control and commercial AMF. Leaf defenses were unaffected by AMF treatments, but conventional AMF increased root cucurbitacin C, the primary defensive chemical of C. sativus, compared to organic AMF. These effects may have important consequences for herbivore preference and population dynamics. AMF from both organic and conventional farms decreased flower production relative to commercial and control treatments, which may reduce pollinator attraction and plant reproduction. AMF from both farm types also reduced seed germination, but effects on plant growth were limited. Our results suggest that studies only considering AMF effects on growth may overlook changes in plant traits that have the potential to influence interactions, and hence yield, on farms. Given the effects of AMF on plant traits documented here, and the great importance of both herbivores and pollinators to wild and cultivated plants, we advocate for comprehensive assessments of mycorrhizal effects in complex community contexts, with the aim of incorporating multispecies interactions both above and below the soil surface.

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Arbuscular mycorrhizal fungal community structure and diversity in response to 3-year conservation tillage management in a sandy loam soil in North China

Cited by 19 publications

References 49 publications

Different responses of arbuscular mycorrhizal fungal community to day-time and night-time warming in a semiarid steppe

Different responses of arbuscular mycorrhizal fungal community to day-time and night-time warming in a semiarid steppe

Agricultural practices indirectly influence plant productivity and ecosystem services through effects on soil biota

Linking agricultural practices, mycorrhizal fungi, and traits mediating plant–insect interactions

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